The Atmosphere

The Ozone Layer

How big is the hole in the ozone?

In 2007 the ozone hole was measured to be 9.3 million square miles (24 million square kilometers) in size. But this was a smaller hole than the record, set in September 2006, when the ozone hole was a gaping 10.6 million square miles (27.5 million square kilometers) in area.



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